code: def tile(self, tileable_graph: TileableGraph):
      ops = [
          t.op for t in tileable_graph if isinstance(t.op, ApplyOperand)
      ]
      for op in ops:
          assert hasattr(op, "func_key")
          assert op.func_key is None
          assert op.func is not None
          assert callable(op.func)
          assert op.need_clean_up_func is False
      result = super().tile(tileable_graph)
      for op in ops:
          assert hasattr(op, "func_key")
          if op.need_clean_up_func:
              assert op.func is None
              assert isinstance(op.func_key, ray.ObjectRef)
          else:
              assert callable(op.func)
              assert op.func_key is None
      return result
  
imports: from typing import Any, Dict
  import pandas
  import pytest
  from ....None import dataframe
  from ....dataframe.base.apply import ApplyOperand
  from ....config import option_context
  from ....core import TileableGraph, OperandType
  from ....services.task.supervisor.tests import CheckedTaskPreprocessor
  from ....services.subtask.worker.tests import CheckedSubtaskProcessor
  from ....services.task.supervisor.preprocessor import TaskPreprocessor
  from ....services.subtask.worker.processor import SubtaskProcessor
  from ....utils import lazy_import
  from ..local import _load_config
  from ..tests.session import new_test_session, CONFIG_FILE
label_desc: Use image node_id 1 for calling the RayBackendFuncTaskPreprocessor obj's underlying member method code with example usage: obj.tile(tileable_graph) and returns: result